I write this with considerable impatience and one question. Do we really have the time to waste on controversies like what ancient India did or did not achieve by way of scientific discoveries? This is when there is the huge unfinished agenda to use the best of science to tackle current challenges and crises.

Budget 2015, presented by Finance Minister Arun Jaitley, has a first. In it, India has accepted that it has a de-facto carbon tax—on petroleum products and dirty coal. Arguably, the only big green initiative of this budget is the increase of cess on coal—from Rs 100 per tonne to Rs 200 per tonne. But the question is: is this carbon tax, imposed on the carbon content of fuel, doing what it should—reduce greenhouse gas emissions that are responsible for climate change?

Climate change negotiations are by now predictable. The already-industrialised come to each conference of the parties (COP) with a clear game plan, that is, to erase their contribution to the emissions already present in the atmosphere, thereby effectively remove the differentiation between their responsibility and that of the rest of the world to act. This would rewrite the 1992 convention on climate change and let them evade the obligation to provide funds and technology for action in the developing world.

THE EASIEST way to clear air pollution is to not know how bad it is. This is what India practices—in most parts of the country. There is virtually no equipment to monitor the air we breathe and no system that tells us what we should do when pollution levels are up and unhealthy.

The Indian government must not use “equity” to block climate change negotiations. It must be proactive on equity and put forward a position on how to operationalise the sharing of the carbon budget—accounting for countries’ contribution to past emissions and allocating future space—in climate talks.

I wrote this last year when the UPA government was in power. I am repeating this as the NDA government prepares for the next conference of parties (CoP) to be held in December in Peru.

The building sector is set to grow exponentially. It already has a huge environmental footprint, with the domestic and commercial sectors consuming some 30 per cent of India’s electricity. So, the imperative to go green is clear. The question is where India is and where it should go.

The Bureau of Energy Efficiency (BEE) has issued the Energy Conservation Building Code (ECBC) to improve the energy performance of buildings by 40-60 per cent. But the use of the code in design is not linked to the actual performance of the building after it has been commissioned.

One item on the agenda of the much-discussed Narendra Modi-Barack Obama meeting that has Indian commentators flummoxed is hydrofluorocarbons (HFCs). The joint statement issued after the meeting of the two heads of states says rather ambiguously that the two sides agreed to cooperate on “next steps to tackle the challenge posed by HFCs to global warming.”

There is no question that India and other parts of the still-under-construction world must build green. The building sector is a major contributor to climate change and local environmental destruction because of construction materials used; energy expended for lighting, heating and cooling; and water consumption and waste discharge. This is the threat. There is an opportunity as well.

While climate change is increasing the frequency of extreme weather events, traditional system of flood management through lakes and connected water channels has been forgotten. This makes flood and devastation inevitable